you know, if you get tired and have to take a break, do it. It's not like anyone NEEDS to play for 7 hours anyway. I personally don't think it will be a big deal...the advertisements are probably somewhat exaggerated just to make it seem more eye catching. The people in the E3 videos don't look too strained. And I think the guy hiding behinf the couch playing metroid and jumping out is just for show of course...there can only be so much movement before it inhibits the players ability to actually play the game.